Figure 7. Results for MCMC inversion consistent with eq. (20) applied to the syringe experiments of Hoyos et al. (2022) as a function of grain size and average experimental porosity. Mixture viscosity of experiments of Hoyos et al. (2022) as a function of grain size expressed A) relatively and B) absolutely using EXP019 as a reference. C) \(\xi_{\text{ref}}\) obtained for each experiment as a function of average porosity of the experiment. Because the syringe experiments isolate repacking, \(\xi_{\text{ref}}\), is a constant and should not vary as a function of average porosity for each experiment. D) Same figure as panel c except zoomed in.